Good Morning, Fallulabell
This is the new whisky from Famous Grouse, designed to be stored in the freezer and served cold, isn't it?
I'm afraid you might be out of luck. The launch publicity suggested that, for the first 6 months, Snow Grouse would only be sold through "international travel retailers". We took this to mean airports.
The distributors are a company called Maxxium Global Travel Retail who supply to the "global duty free and travel retail industry", which probably confirms our understanding.
You may have to wait until the Spring to buy it in the UK, but look out for it in the Duty Free shop if you travel abroad.